Install light and dark icons only with KF5 < 5.23

CMakeLists.txt

@@ -76,6 +76,14 @@ check_include_files(pthread.h HAVE_PTHREAD_H)
 find_package(Qt5 REQUIRED COMPONENTS Core DBus Widgets Script Svg Quick )
 find_package(Qt5 OPTIONAL_COMPONENTS WebKitWidgets QUIET)
 
+find_package(KF5 5.23.0 OPTIONAL_COMPONENTS XmlGui QUIET)
+if (KF5XmlGui_FOUND)
+  message(STATUS "Found KF5 >= 5.23.0 enabling icon coloring")
+else()
+  message(STATUS "KF5 < 5.23.0 Disable icon coloring")
+  set(KF5_ICON_COMPATIBILITY TRUE)
+endif()
+
 find_package(KF5 REQUIRED COMPONENTS Archive Bookmarks CoreAddons Config ConfigWidgets 
                             DBusAddons KIO WidgetsAddons NotifyConfig NewStuff XmlGui Notifications GuiAddons TextWidgets IconThemes DocTools Crash OPTIONAL_COMPONENTS FileMetaData)
 

data/CMakeLists.txt

@@ -5,7 +5,11 @@ add_subdirectory(icons)
 add_subdirectory(lumas)
 add_subdirectory(man)
 add_subdirectory(titles)
-#add_subdirectory(pics)
+
+if (KF5_ICON_COMPATIBILITY)
+  add_subdirectory(pics)
+endif()
+
 install(FILES
   banner.png
   blacklisted_effects.txt